Actor Julian Sands’ cause of death has been ruled as “undetermined”, after his remains were found months after he vanished on a mountain hike in Southern California.

British-born Sands, best known for his role in the Oscar-celebrated film A Room with a View, went missing while hiking in snow-covered mountains near Los Angeles in January.

No traces of him were found until last month, when hikers stumbled over mostly skeletal human remains in the area where the 65-year-old had vanished.

They were later confirmed by the San Bernardino County coroner as belonging to the actor.

On Tuesday (AEST), the coroner’s department issued its final ruling in the tragic find.

“The cause is ‘undetermined’ due to the condition of the body and because no other factors were discovered during the coroner’s investigation, this is common when dealing with cases of this type. This is the final determination,” San Bernardino County Sheriff’s Coroner Department public information officer Mara Rodriguez said.

Sands, a known avid mountain climber and hiker, was reported missing on the night of Friday, January 13, after heading out for a solo hike in the Baldy Bowl Wilderness Preserve of the San Gabriel Mountains earlier that day.

A search party was organised. But the hunt had to be put on hold within 24 hours because of avalanche risks and poor trail conditions.

Several subsequent efforts came up empty-handed, including a major search conducted just weekend before Sands’ remains were ultimately found, according to the sheriff’s department.

Sands had ventured into the area despite weather advisories warning that heavy snow from weeks of winter storms in Southern California had made the Mount Baldy area treacherous for outdoor recreation, with overnight temperatures dropping to as low as -4 degrees.

Mobile phone signals detected on Sunday, January 15, showed Sands was then heading toward the ridge of Mount Baldy, apparently the last indication he was still on the move, the sheriff’s department reported then.

Sands, in a 2020 interview with The Guardian newspaper, described himself as happiest when he was “close to a mountain summit on a glorious cold morning”.

He also recalled a brush with death during a climb in the Andes in the early 1990s when he became caught in a storm with three others.

“We were all in a very bad way,” he said.

“Some guys close to us perished. We were lucky.”

Born in England as the third of five boys and educated at Lord Wandsworth College in Hampshire, Sands began his career with supporting roles in such films as Oxford Blues, appearing as the romantic rival of Rob Lowe’s lead character, and The Killing Fields, playing a young war correspondent in Cambodia.

Sands moved to California in the 1980s after the success of A Room with a View, an Edwardian period romance in which he was cast as the leading man opposite Helena Bonham Carter.

Based on EM Forster’s 1908 novel of the same title and set in England and Italy, the 1985 film was nominated for eight Academy Awards, including best picture.

It won Oscars for best adapted screenplay, art direction and costume design.

Developing a knack for the horror genre, Sands also starred as a son of Satan in the 1989 supernatural thriller Warlock and its sequel Warlock: The Armageddon.

He played a spider expert in the 1990 comedy-creeper Arachnophobia, a twisted, obsessed surgeon in 1993’s Boxing Helena and the title role in the 1998 film version of The Phantom of the Opera.

In recent years, Sands found success appearing in one-man stage shows reciting the poetry of Harold Pinter, John Keats and Percy Shelley, the latter of which he played in the 1986 psychological thriller Gothic.

Although never Oscar-nominated himself, Sands dated Jodie Foster and was her escort to the Academy Awards in 1989 the night she won her first best-actress statuette for The Accused.

The two co-starred in the little-seen 1987 indie film Siesta.

Sands is survived by his second wife, Evgenia Citkowitz, a journalist, with whom he had two daughters.

He also had a son by his first wife, journalist Sarah Harvey.

-with AAP